// From
Optional<UUID> getRememberMeHeader() {
        try {
            def header = request.getHeader(REMEMBER_ME_HEADER)
            if (!header) {
                return Optional.empty()
            }
            Optional.of(UUID.fromString(header))
        }
        catch(IllegalArgumentException ignored) {
            Optional.empty()
        }
    }

// To
Optional<UUID> getRememberMeHeader() {
        WebUtils
                .getHeader(request, REMEMBER_ME_HEADER)
                .flatMap { LangUtils.parseUUID(it) }
    }